H?i ??ng XSKT khu v?c mi?n Nam yêu c?u ??i lý ph?i cho ng??i bán l? tr? l?i vé s? ?Harmonics are periodic distortions of voltage, recent, or electric power sine waves. Harmonics in power distribution programs are frequently a result of non-linear masses including switched method dc energy materials and adjustable pace motor drives.123B/124B/1